From patchwork Thu Jun 29 10:57:06 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Lieven X-Patchwork-Id: 782158 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wyxTr07rLz9s7g for ; Thu, 29 Jun 2017 20:58:23 +1000 (AEST) Received: from localhost ([::1]:38308 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQX9Q-00075w-L7 for incoming@patchwork.ozlabs.org; Thu, 29 Jun 2017 06:58:20 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51656) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dQX8d-00071z-KL for qemu-devel@nongnu.org; Thu, 29 Jun 2017 06:57:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dQX8a-000803-K0 for qemu-devel@nongnu.org; Thu, 29 Jun 2017 06:57:30 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:36025 helo=mx01.kamp.de) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dQX8a-0007vc-AY for qemu-devel@nongnu.org; Thu, 29 Jun 2017 06:57:28 -0400 Received: (qmail 8964 invoked by uid 89); 29 Jun 2017 10:57:24 -0000 Received: from [195.62.97.28] by client-16-kamp (envelope-from , uid 89) with qmail-scanner-2010/03/19-MF (clamdscan: 0.99.2/23517. avast: 1.2.2/17010300. spamassassin: 3.4.1. 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Processed in 0.29144 secs); 29 Jun 2017 10:57:24 -0000 Received: from smtp.kamp.de (HELO submission.kamp.de) ([195.62.97.28]) by mx01.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted); 29 Jun 2017 10:57:20 -0000 X-GL_Whitelist: yes Received: (qmail 12764 invoked from network); 29 Jun 2017 10:57:15 -0000 Received: from lieven-pc.kamp-intra.net (HELO lieven-pc) (relay@kamp.de@::ffff:172.21.12.60) by submission.kamp.de with ESMTPS (DHE-RSA-AES256-GCM-SHA384 encrypted) ESMTPA; 29 Jun 2017 10:57:15 -0000 Received: by lieven-pc (Postfix, from userid 1000) id A4B2526C38; Thu, 29 Jun 2017 12:57:15 +0200 (CEST) From: Peter Lieven To: qemu-block@nongnu.org Date: Thu, 29 Jun 2017 12:57:06 +0200 Message-Id: <1498733831-15254-4-git-send-email-pl@kamp.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1498733831-15254-1-git-send-email-pl@kamp.de> References: <1498733831-15254-1-git-send-email-pl@kamp.de> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a02:248:0:51::16 Subject: [Qemu-devel] [PATCH V2 3/8] block/qcow2: parse compress create options X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, Peter Lieven , qemu-devel@nongnu.org, mreitz@redhat.com, den@openvz.org, lersek@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" this adds parsing and validation for the compress create options. They are only validated but not yet used. Signed-off-by: Peter Lieven --- block/qcow2.c | 56 +++++++++++++++++++++++++++++++++++++++++++++-- block/qcow2.h | 9 ++++++++ include/block/block_int.h | 2 ++ 3 files changed, 65 insertions(+), 2 deletions(-) diff --git a/block/qcow2.c b/block/qcow2.c index 2f94f03..308121a 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -2144,7 +2144,8 @@ static int qcow2_create2(const char *filename, int64_t total_size, const char *backing_file, const char *backing_format, int flags, size_t cluster_size, PreallocMode prealloc, QemuOpts *opts, int version, int refcount_order, - Error **errp) + const char *compress_format_name, + uint8_t compress_level, Error **errp) { int cluster_bits; QDict *options; @@ -2390,11 +2391,24 @@ out: return ret; } +static int qcow2_compress_format_from_name(char *fmt) +{ + if (!fmt || !fmt[0]) { + return QCOW2_COMPRESS_ZLIB_COMPAT; + } else if (g_str_equal(fmt, "zlib")) { + return QCOW2_COMPRESS_ZLIB; + } else { + return -EINVAL; + } +} + static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp) { char *backing_file = NULL; char *backing_fmt = NULL; char *buf = NULL; + char *compress_format_name = NULL; + uint64_t compress_level = 0; uint64_t size = 0; int flags = 0; size_t cluster_size = DEFAULT_CLUSTER_SIZE; @@ -2475,15 +2489,40 @@ static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp) refcount_order = ctz32(refcount_bits); + compress_format_name = qemu_opt_get_del(opts, + BLOCK_OPT_COMPRESS_FORMAT); + ret = qcow2_compress_format_from_name(compress_format_name); + if (ret < 0) { + error_setg(errp, "Compress format '%s' is not supported", + compress_format_name); + goto finish; + } + compress_level = qemu_opt_get_number_del(opts, BLOCK_OPT_COMPRESS_LEVEL, + compress_level); + if (ret == QCOW2_COMPRESS_ZLIB_COMPAT && compress_level > 0) { + error_setg(errp, "Compress level can only be defined in conjunction" + " with compress format"); + ret = -EINVAL; + goto finish; + } + if ((ret == QCOW2_COMPRESS_ZLIB && compress_level > 9) || + compress_level > 0xff) { + error_setg(errp, "Compress level %" PRIu64 " is not supported for" + " format '%s'", compress_level, compress_format_name); + ret = -EINVAL; + goto finish; + } + ret = qcow2_create2(filename, size, backing_file, backing_fmt, flags, cluster_size, prealloc, opts, version, refcount_order, - &local_err); + compress_format_name, compress_level, &local_err); error_propagate(errp, local_err); finish: g_free(backing_file); g_free(backing_fmt); g_free(buf); + g_free(compress_format_name); return ret; } @@ -3458,6 +3497,19 @@ static QemuOptsList qcow2_create_opts = { .help = "Width of a reference count entry in bits", .def_value_str = "16" }, + { + .name = BLOCK_OPT_COMPRESS_FORMAT, + .type = QEMU_OPT_STRING, + .help = "Compress format used for compressed clusters (zlib)", + .def_value_str = "" + }, + { + .name = BLOCK_OPT_COMPRESS_LEVEL, + .type = QEMU_OPT_NUMBER, + .help = "Compress level used for compressed clusters (0 = default," + " 1=fastest, x=best; x varies depending on compress.format)", + .def_value_str = "0" + }, { /* end of list */ } } }; diff --git a/block/qcow2.h b/block/qcow2.h index 87b15eb..d21da33 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -171,6 +171,15 @@ typedef struct Qcow2UnknownHeaderExtension { } Qcow2UnknownHeaderExtension; enum { + /* QCOW2_COMPRESS_ZLIB_COMPAT specifies to use the old standard + * zlib compression with a smaller window size that is compatible with + * old QEMU versions. This compression is used if no compression format + * is specified at create time */ + QCOW2_COMPRESS_ZLIB_COMPAT = 0, + QCOW2_COMPRESS_ZLIB = 1, +}; + +enum { QCOW2_FEAT_TYPE_INCOMPATIBLE = 0, QCOW2_FEAT_TYPE_COMPATIBLE = 1, QCOW2_FEAT_TYPE_AUTOCLEAR = 2, diff --git a/include/block/block_int.h b/include/block/block_int.h index 15fa602..49811b0 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -57,6 +57,8 @@ #define BLOCK_OPT_NOCOW "nocow" #define BLOCK_OPT_OBJECT_SIZE "object_size" #define BLOCK_OPT_REFCOUNT_BITS "refcount_bits" +#define BLOCK_OPT_COMPRESS_FORMAT "compress.format" +#define BLOCK_OPT_COMPRESS_LEVEL "compress.level" #define BLOCK_PROBE_BUF_SIZE 512